d. Empiricism
As empiricism is basically an experience derived from senses. So here through the text we can see that empiricism is very evident.
Which words are supposed to be bold?
The correct answer is the first option.
The sentence that presents the correct subject-verb agreement is the first one since in it we are talking about "heavy rains" OR "fast-melting snow". In other words, the subject is coordinated by the conjunction "OR" which makes the subject singular. The verb "causes" is conjugated in the third person singular.
The answer is False.
Scientific fact is the opposit of scientific future